Lynnewood Hall one of the largest surviving Gilded age Mansion in the Philadelphia area ... 2 parcels 310000820004 and 310000823001 ( 33.85 Glorious Gated Acres )Endless Possibilities For Development in Proposed MU 3 ( Mixed Use Overlay District )This 110 room Neoclassical mansion was designed by architect Horace Trumbauer for industrialist Peter A.B. Widener between 1897 and 1900